Progressive lesbians in London

I've lived in London for two years now and have yet to meet any truly progressive lesbians. I'm single and in my early fifties (51) but I'm one of those very lucky people who look at least ten years younger than my stated age. Anyway, I'm totally into books and writing and art galleries and museums and travelling, but the lesbians I've met over here seem to be into the club scene or staying at home getting fat and sloppy and lazy. I've also found it very difficult to meet women who understand the true meaning of being progressive, in every aspect of their lives, so I'm wondering if there's any other place for lesbians of color who prefer to date white or mixed race women, to live or just hang out. Any suggestions?